Establishing Active Fluorescence as a Primary Productivity Metric for the World's Coasts and Oceans

Session ID#: 84749

Session Description:
Active chlorophyll fuorescence (ChlF) measurements, first introduced to marine science in the late 1980s, provide a fast and non-invasive method to examine phytoplankton ecophysiology and derive productivity by quantifying various photosynthetic processes, including quantum yields. Rapidly progressing engineering capacity has resulted in a surge of new fluorometers and approaches, creating the potential for a new era of autonomous primary productivity measurements. Yet, despite nearly 40 years in service, significant methodological and conceptual uncertainties remain in applying ChlF methods to infer primary productivity. A new SCOR Working Group (156) was recently established to identify key opportunities and challenges in how ChlF can intensively assay primary productivity, develop methodological protocols for best-practice, and software tools to support widespread adoption of these measurements by a global user-base. This tutorial will present an overview of key developments in the field of active ChlF, and describe critical operational uncertainties that must be considered in deployment of instruments and interpretation of resulting data. We will discuss key variables influencing ChlF parameters in coasts and oceans, key metadata required for meaningful interpretations, different approaches to derive photosynthetic electron transport rates from ChlF, and how these estimates can be best compared against independent productivity ‘bench-marks’.
  • OB - Ocean Biology and Biogeochemistry
  • OD - Ocean Data Management
  • PI - Physical-Biological Interactions
Index Terms:

1912 Data management, preservation, rescue [INFORMATICS]
4853 Photosynthesis [OCEANOGRAPHY: BIOLOGICAL]
4894 Instruments, sensors, and techniques [OCEANOGRAPHY: BIOLOGICAL]
Primary Presenter:  David J Suggett, University of Technology Sydney, Climate Change Cluster, Sydney, Australia
Co-Presenter:  Philippe Daniel Tortell, University of British Columbia, EOAS, Vancouver, BC, Canada
Moderators:  Colleen B Mouw, University of Rhode Island, Narragansett, RI, United States and Camille Pagniello, Scripps Institution of Oceanography, University of California - San Diego, San Diego, CA, United States

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